Validity and reliability of the Health Literacy Assessment Scale for adherence to drug treatment among diabetics.

Objective: To prepare an instrument to evaluate health literacy with regard to adherence to drug treatment among diabetics, identify the validity of its content, and estimate its reliability.
Methods: Pilot study, with the following stages of instrument construction: literature review, content validation, reliability estimation (internal consistency/Cronbach's alpha and reproducibility/Kappa).
Results: The validity of content was completed and presented alpha=0.77 and Kappa values ranged from 0.31 to 1.00.
Conclusion: The instrument was approved regarding content validity, presented acceptable internal consistency and reproducibility. However, when applied, measurement errors it can produce must be considered.